<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<button  onclick="abc1()">-</button>
<font id=a1 >0</font>
<button  onclick="abc2()" >+</button>
<script type="text/javascript">
/* function abc1 (){
  	if(){
  		
  	}
}
function abc2 (){
	if(){
		
	}
} */





</script>
</body>
</html>